diff --git a/src/consumer.rs b/src/consumer.rs
index 5c0e79d46..e07aba71a 100644
--- a/src/consumer.rs
+++ b/src/consumer.rs
@@ -8,7 +8,6 @@
 //! This consumer will take 4 samples from the input, print them, then stop
 //!
 //! ```rust
-//! #![feature(io)]
 //!  use nom::{IResult,Needed,MemProducer,Consumer,ConsumerState};
 //!  use std::str;
 //!  use std::io::SeekFrom;
@@ -113,7 +112,7 @@ pub trait Consumer {
         let mut tmp = Vec::new();
         //println!("before:\n{}", acc.to_hex(16));
         //println!("after:\n{}", (&acc[consumed..acc.len()]).to_hex(16));
-        tmp.push_all(&acc[consumed..acc.len()]);
+        tmp.extend(acc[consumed..acc.len()].iter().cloned());
         acc.clear();
         acc = tmp;
       } else {
@@ -124,7 +123,7 @@ pub trait Consumer {
           acc.clear();
         } else {
           let mut tmp = Vec::new();
-          tmp.push_all(&acc[consumed..acc.len()]);
+          tmp.extend(acc[consumed..acc.len()].iter().cloned());
           acc.clear();
           acc = tmp;
         }
@@ -134,7 +133,7 @@ pub trait Consumer {
           match state {
             Data(v) => {
               //println!("got data: {} bytes", v.len());
-              acc.push_all(v);
+              acc.extend(v.iter().cloned());
               position = position + v.len();
             },
             Eof(v) => {
@@ -146,7 +145,7 @@ pub trait Consumer {
               } else {
                 //println!("eof with {} bytes", v.len());
                 eof = true;
-                acc.push_all(v);
+                acc.extend(v.iter().cloned());
                 position = position + v.len();
                 break;
               }
diff --git a/src/lib.rs b/src/lib.rs
index 9051c844e..919607331 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -34,8 +34,6 @@
 //! ```
 //!
 
-#![feature(collections)]
-
 pub use self::util::*;
 pub use self::internal::*;//{IResult, IResultClosure, GetInput, GetOutput};
 pub use self::map::*;
diff --git a/src/macros.rs b/src/macros.rs
index 17b359baa..146e07a5f 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -1,5 +1,3 @@
-extern crate collections;
-
 #[macro_export]
 macro_rules! closure (
     ($ty:ty, $submac:ident!( $($args:tt)* )) => (
diff --git a/src/nom.rs b/src/nom.rs
index 1100877f1..f6796d49c 100644
--- a/src/nom.rs
+++ b/src/nom.rs
@@ -6,8 +6,6 @@
 //! but the macros system makes no promises.
 //!
 
-extern crate collections;
-
 use std::fmt::Debug;
 use internal::*;
 use internal::IResult::*;
diff --git a/src/producer.rs b/src/producer.rs
index c0f7a27b3..d412c4dce 100644
--- a/src/producer.rs
+++ b/src/producer.rs
@@ -34,6 +34,7 @@ use std::fs::File;
 use std::path::Path;
 use std::io;
 use std::io::{Read,Seek,SeekFrom};
+use std::iter::repeat;
 
 /// Holds the data producer's current state
 ///
@@ -78,9 +79,10 @@ impl FileProducer {
 
 impl Producer for FileProducer {
   fn produce(&mut self) -> ProducerState<&[u8]> {
+    let len = self.v.len();
     //let mut v = Vec::with_capacity(self.size);
     //self.v.clear();
-    self.v.resize(self.size, 0);
+    self.v.extend(repeat(0).take(self.size - len));
     match self.file.read(&mut self.v) {
       Err(e) => {
         //println!("producer error: {:?}", e);
@@ -217,7 +219,7 @@ macro_rules! pusher (
         match state {
           ProducerState::Data(v) => {
             //println!("got data");
-            acc.push_all(v)
+            acc.extend(v.iter().cloned())
           },
           ProducerState::Eof(v) => {
             if v.is_empty() {
@@ -225,13 +227,13 @@ macro_rules! pusher (
               break;
             } else {
               //println!("eof with {} bytes", v.len());
-              acc.push_all(v)
+              acc.extend(v.iter().cloned())
             }
           }
           _ => {break;}
         }
         let mut v2: Vec<u8>  = Vec::new();
-        v2.push_all(&acc[..]);
+        v2.extend(acc[..].iter().cloned());
         //let p = IResult::Done(b"", v2.as_slice());
         match $f(&v2[..]) {
           IResult::Error(e)      => {
@@ -244,7 +246,7 @@ macro_rules! pusher (
           IResult::Done(i, _)    => {
             //println!("data, done");
             acc.clear();
-            acc.push_all(i);
+            acc.extend(i.iter().cloned());
           }
         }
       }
diff --git a/tests/mp4.rs b/tests/mp4.rs
index c42425fe8..fe3649f6a 100644
--- a/tests/mp4.rs
+++ b/tests/mp4.rs
@@ -1,4 +1,3 @@
-#![feature(log_syntax,trace_macros)]
 #![allow(dead_code)]
 
 #[macro_use]
diff --git a/tests/test1.rs b/tests/test1.rs
index a04bc98ed..ddddc6fe2 100644
--- a/tests/test1.rs
+++ b/tests/test1.rs
@@ -1,5 +1,3 @@
-#![feature(collections,slice_patterns)]
-
 #[macro_use]
 extern crate nom;